My MTB is vintage 2005 with XTR ST-M685 dual levers and disque brakes, BR-M966 fork post mount and BR-M965 at the rear. The BR-M966 has started leaking oil from the piston. Finding a replacement caliper seems to be impossible and I am thinking about putting abother model in the front (e.g. an BR-M820 Saint post mount). I am a moderate cyclist with a 26" hardtail.
I have come across a helpful post on Is the banjo bolt the same between the Shimano XTR and Shimano Saint rear brake caliper? with a technical discussion on hoses, but is it a risky approach? Anybody who can share their experience?